Results 231 to 240 of about 19,355 (297)

Editorial to hydrometallurgy

Hydrometallurgy, 2021
The increasing demand for metals, materials and commodities associated with modern technology, the decreasing grades of natural ores, and complex separation and recovery processes of metals and value-added products pose many challenges for researchers in hydrometallurgy...
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Silica in Hydrometallurgy: An Overview

Canadian Metallurgical Quarterly, 1986
AbstractSilicon is the second most abundant element in the earth's crust; thus, familiarity with the behavior of silica in wet processing systems is important to the hydrometallurgist. Plant problems originating from silica are numerous. These problems often occur in the high-tonnage, high-volume portion of the flowsheet.
Paul B. Queneau, Cornelius E. Berthold
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Enhanced mechanical stirring by eccentric impeller stirring system in zinc hydrometallurgy process for cadmium removal

International journal of Chemical Reactor Engineering, 2022
The fluid in the reactor can be poorly mixed, so an eccentric impeller is proposed to improve the fluid mixing efficiency. In this investigation, numerical simulations and cadmium removal experiments for the purification of zinc sulfate solution were ...
Wenjie Li, Shibo Wang, Hua Wang, Chunlin Li, Y. Zhai, Jianxin Xu, Q. Xiao   +6 more
semanticscholar   +1 more source

Hydrometallurgy and Electrometallurgy

2016
In Chapter 8 we examined some traditional techniques for the production of “tonnage” metals such as steel, aluminum, and copper. These techniques involved high temperature, molten metals, and slags and difficulties posed by the emission into the environment of particles, sulfur dioxide, and so on.
Lutgard C. De Jonghe, James Evans
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Magnetite precipitation approach for zinc hydrometallurgy: A microfluidic strategy

Environmental Science: Nano
Magnetite (Fe3O4) possesses the highest theoretical Fe content (72.4%) among various iron oxides, as well as magnetic properties.
Jiawei Li, Zhihui Yang, Wenchao Zhang, Deyi Zhu, Jiahui Wu, Xiaoyun Liu, Qingwei Wang, Meiqing Shi, Yan Xu, Zhang Lin   +9 more
semanticscholar   +1 more source

Hydrometallurgy in the mining industry

Metallurgist, 2008
There are many links between microbiology and mining, and the number of such ties is continuing to grow. With its methods, concepts, and — ultimately — its products, modern chemistry is determining the technology of the future. However, research is needed in many different areas in order for this to continue. At the same time, development of the latest
S. A. Chernyak, V. Zh. Arens
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A novel oxidant for nickel hydrometallurgy

Hydrometallurgy, 1979
Abstract Nickelic hydroxide is an important metallurgical reagent used for precipitating cobalt from nickel sulfate solutions. Existing methods of preparation of nickelic hydroxide involve electrolytic oxidation of Ni(OH)2 or the use of strong oxidizing agents such as chlorine, ozone and persulfate.
V.A. Ettel, M.A. Mosoiu, E.A. Devuyst
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Mechanical activation in hydrometallurgy

International Journal of Mineral Processing, 2003
Abstract The review paper deals with the results of the utilization of mechanical activation in hydrometallurgy. The definition of mechanochemistry is given as well as physicochemical changes in mechanically activated minerals are described. The enhancement of the leaching processes in hydrometallurgy is illustrated.
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The Hydrometallurgy of Gold Processing

Interdisciplinary Science Reviews, 1992
AbstractGold has captured mankind's admiration for centuries as a medium of currency or exchange, for personal jewellery and for decorative and ornamental purposes. The mythical tale of Jason and the Golden Fleece may have its origins in the placer miners' technique of placing sheep's fleeces in sluices to capture gold flakes.
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Chemical Processing: Hydrometallurgy

2016
Innovative development of a sustainable hydrometallurgical process requires economic and environmental considerations, and the application of knowledge and experience gained in a variety of chemical processing steps. Over the past decades, technological innovations have occurred largely in changes to exploit lower grade ores and continually reduce the ...
Vaikuntam I. Lakshmanan, Shiv Vijayan, M. A. Halim   +2 more
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